<;P>;PROBLEM TO BE SOLVED: To provide a method for preparing composite particles for manufacturing clear colored cosmetics by making the use of the properties of plate-shaped particles containing particulates. <;P>;SOLUTION: The method for preparing the composite particles includes: a process (i) of mixing the plate-shaped particles of an average size of 1-100 &mu;m containing particles (a) of an average size of 0.01-0.10 &mu;m and particles (b) of an average size of 0.01-0.10 &mu;m at a peripheral speed of 20-60 m/s by using a mechanical stirring-type mixer provided with rotary blades; a process (ii) of mixing a coloring pigment of an average size of 0.1-1.0 &mu;m with the mixture obtained in the process (i) at a peripheral speed of 5-15 m/s by using a mechanical stirring-type mixer provided with rotary blades; and a process (iii) of bringing the mixture obtained in the process (ii) into contact with an organic polymer compound in the presence of supercritical carbon dioxide or subcritical carbon dioxide in a container. <;P>;COPYRIGHT: (C)2010,JPO&INPIT